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8: Setup Mode: Channel Configuration
XPress DR+ User Guide 57
Without Echo
In Modem Mode, echo refers to the echo of all of the characters
entered in command mode; it does not mean to echo data that is
transferred. Quiet Mode (without echo) refers to the modem not
sending an answer to the commands received (or displaying what
was typed).
Data Echo & Modem
Response
Full Verbose: The unit echoes modem commands and responds to
a command with a message string shown in the table below.
Numeric Response: The unit echoes modem commands and
responds to a command with a numeric response.
Modem Responses
Only
Full Verbose: The unit does not echo modem commands and
responds to a command with a message string shown in the table
below.
Numeric Response: The unit does not echo modem commands
and responds to a command with a numeric response.
Table 8-6. Modem Mode Messages
Message Meaning
Full Verbose
OK Command was executed without error.
CONNECT A network connection has been established.
NO CARRIER A network connection has been closed.
RING n.n.n.n. A remote device, having IP address n.n.n.n, is connecting to this device.
Numeric Response
0 OK
1 Connected
2 Ring
3 No Carrier
4 Error
Received commands must begin with the two-character sequence AT and be terminated
with a carriage return character.
The unit ignores any character sequence received not starting with AT, and only
recognizes and processes single AT-style commands. The unit treats compound AT
commands as unrecognized commands.
If the Full Verbose option is in effect, the unit responds to an unrecognized command
string that is otherwise formatted correctly (begins with AT and ends with carriage return)
with the "OK" message and takes no further action.
If the Numeric Response option is in effect, the unit responds to an unrecognized
command string that is otherwise formatted correctly with the "0" message and takes no
further action.
When an active connection is in effect, the unit transfers data and does not process
commands received from the serial interface.
When a connection is terminated or lost, the unit reverts to command mode.